Flushing system for outboard motor

A flushing system for a water-cooled marine propulsion system comprised of a water-cooled internal combustion engine having a cooling jacket, a propulsion unit driven by said engine, an outer housing assembly containing at least some of the components of said internal combustion engine and said propulsion unit, a water inlet opening in said outer housing for drawing water from a body of water in which said marine propulsion system is operating, a cooling water discharge for discharging cooling water back to the body of water in which said marine propulsion system is operating, means for circulating water in a cooling water path between said water inlet, said engine cooling jacket and said cooling water discharge, a flexible conduit connected at one end with said cooling water path and having a fitting at its other end for attachment to a source of flushing water, and a complementary fitting carried by said outer housing to which said fitting on said other end of said flexible conduit is adapted to be attached for closing said other end of said flexible conduit when not in use.